I created a tic-tac-toe game to help kids distinguish between multiplying negatives and positives. Use the same board but use + and - instead of x and o. Next have each player pic a square that is theirs. Have them place a + or - symbol beside the square and what ever goes inside must first be multiplied by the - or the +.

Example,

if you place a - inside a "+ charged square" the square becomes negative

if you place a - inside a "- charged square" the square becomes positive

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